HYDRAULIC COUPLER WITH EXCELLENT FLOW PROPERTIES
SubseaDesign’s hydraulic coupler can be pressure tested to full system working pressure against the retracted coupler without the need for an additional test cap. Due to the compact design and self sealing abilities of both sides of the coupler, ingress from sea water is confined to a minimum.
The couplers are DNVGL design approved and qualified to 3000 m (10.000ft) water depth.
The connectors can be applied on subsea wellhead connectors, riser connectors, emergency disconnect packages, quick release stab plates and emergency disconnect points.
These state of art couplers tolerate high angle interconnection and allows for both front and rear loading into hubs.
Open position
Closed position
Characteristics:
- Metal to metal sealing cone situated in separate seal carrier plates between 2 hubs
- Self sealing coupler halves
- Allows for 3 deg misalignment angle during connection/disconnection
- Front or rear end loaded into the hubs
- End connection to lines can be adapted to line sizes
- High CV value
- Weldable to most common used tube materials
- Poppet with check valve can easily be front loaded after flushing of lines
- Seal area near front of coupler face for easy cleaning
- Design allow for lateral offset after connection
- Poppet housing prevents water ingress during connection
Typical application:
- Subsea Trees
- Tubing Hanger Penetrators
- Production Control Systems
- Drilling Control Systems
- Chemical Injection System
- Umbilicals
Operating condition:
| Re-use of seals | > 10 makes and breaks |
| Temperature range | 29 deg C to 141 deg C |
| Material class | ISO Class FF |
| Water depth | 3000 m |
| Design life | 30 years |
| Service life | 30 years |
Technical data:
| Pressure | Working | 690 bar (10 000 psi) |
| Design | 760 bar (11 000 psi) | |
| Test | 1140 bar ( 16 500 psi) | |
| Material | Coupler body | Nitronic 50 |
| Poppet opener | Inconel 718 | |
| Poppet housing, spring piston, locking ring, flying poppet | 25% duplex | |
| SD-Crown Body Seal | Titanium Gr. 5 / Ag coated | |
| Spring | Elgiloy / MP 35 N | |
| Poppet Seal | Peek | |
| Mate/force | Typical 29 kN | Depending on tolerance through hubs |
| Flow properties (by simulations) | CV value (US) | 3.1 |
| KV | 2.7 | |
| Design Standard | ISO 13629 / API 6a |
